Tool Required

Printpartsummary
Symptoms:
  • Clutch failure
  • Harsh shifts
  • High line pressure
  • Low line pressure
  • Soft shifts
Cause:

Continuous oscillation of the pressure regulator valve causes valve body bore wear, resulting in line pressure irregularities and valve instability.

Correction:

The Sonnax pressure regulator valve kit combines a sleeved balance spool to eliminate the wear preventing proper valve stroke, and a modified pressure regulator valve with lengthened spools to increase sealing contact and provide greater stability

Tool Required

A4CF1, A4CF2

Oversized Pressure Regulator Valve Kit

Part No.

84741-03K

Oversized Pressure Regulator Valve Kit
  • 84741-03k_combo

  • Oversized Pressure Regulator Valve Kit

Small_84741-03k_combo Small_84741-03k

A4CF1, A4CF2

Oversized Pressure Regulator Valve Kit

Part No. 84741-03K

  • Balance Sleeve
  • Balance Valve
  • Retaining Clip
  • O-Rings (2) 1 extra
  • Pressure Regulator Valve
  • Spring

Complaint:

  • Clutch failure
  • Harsh shifts
  • High line pressure
  • Low line pressure
  • Soft shifts

Cause:

Continuous oscillation of the pressure regulator valve causes valve body bore wear, resulting in line pressure irregularities and valve instability.


Correction:

The Sonnax pressure regulator valve kit combines a sleeved balance spool to eliminate the wear preventing proper valve stroke, and a modified pressure regulator valve with lengthened spools to increase sealing contact and provide greater stability

Continuous oscillation of the pressure regulator valve in Hyundai/Kia vehicles with A4CF1, A4CF2 transmissions cause valve body bore wear, resulting in line pressure irregularities and valve instability. The Sonnax pressure regulator valve kit 84741-03K fixes these issues by combining a sleeved balance spool to eliminate the wear preventing proper valve stroke, and a modified pressure regulator valve with lengthened spools to increase sealing contact and provide greater stability.

  • The balance sleeve and valve assembly eliminates wear to allow proper stroking of the valve, has lengthened bore engagement for greater sealing integrity, and is made from wear-resistant materials for durability
  • The pressure regulator valve has lengthened spools at critical locations to increase sealing contact for better pressure regulation and valve stability
  • A new spring is included to restore OE pressure specifications and work with the lengthened pressure regulator valve

Required Tools

Related Parts

You need this if...

A vacuum test at the ports indicated holds 18 in-Hg or more. If poor vacuum results are discovered at the OE pressure regulator valve, Sonnax PR valve kit 84741-01K should be installed.

  • Test Locations

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Valve Body Layouts

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Valve Body Layout Hyundai/Kia A4CF1, A4CF2
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